The Major Inhibitory Neurotransmitter of the Human Brain Is

Question

The major inhibitory neurotransmitter of the human brain is
A) acetylcholine.
B) epinephrine.
C) glutamate.
D) nitric oxide.
E) GABA.

Accepted Answer

GABA (gamma-aminobutyric acid) is the major inhibitory neurotransmitter of the human brain. It works by binding to specific receptors on the post-synaptic cell, which causes the opening of chloride channels and results in hyperpolarization of the cell, making it less likely to fire an action potential. This helps to dampen or inhibit neural activity and regulate excitability in the brain.